Harmonics are periodic distortions of voltage, present, or electrical power sine waves. Harmonics in power distribution methods tend to be attributable to non-linear hundreds like switched manner dc electrical power materials and adjustable speed motor drives..) b?n l?u ý l?i nh?p li?u. Trong ?i?u ki?n có th? MinhNgoc luôn hi?n ho?c trong m?t kh